Nonskid metal covering for stair treads, thresholds, and the like



June 26, 1928. 1,674,713

G. w. BROOKS NONSKID METAL COVERING FOR STAIR TREADS, THRESHOLDS, ANDTHE LIKE Filed March 21, 1927 I N VEN TOR.

A TTORNEY.

Patented June 26, 1928. I i

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.Application fileid March'21, 1927. Serial mime. I

My invention relateslto' non-skid metal covering for stair treads.

Theobject ofmy'inventlon is to provide a nonskid metal coveringconsisting of" a plate having a plurality; of dove-tailed grooves on theface thereof, the grooves being in close proximit to each other.

A further object 0 my invention is'to provide a non-skid metalcoveringthat 1s easily bent to conform to the nosingv of the tread having thenon-skid feature extending therearound.

A still further object-of my invention is p to provide a nosing for thetread having the dove-tailed grooves on the convex side, and

' means to, attach the nosing to the tread by a member engaging on theface thereof, and means on the nosing to receive the edge of a flexibleor rigid facing for the tread.

These and other objects will hereinafter be more fullyexplained.

Referring to the drawings: I Fig.1 is a sectional detailed view ofthecovering applied to a marble stairway.

Fig. 2 is a sectional detailed view showin the covering appliedto a woodstairway.

Tig. 3 is a sectional detailed view of the covering applied tothe nosingof the tread.

The attaching means for the plate .to

wood, marble or metal treads may be done varlous ways, such as uslngdowels, screws or nails (thesaid means not being shown in the drawings).

One of the particular features that I wish to emphasize is that thegrooves extend longitudinally with the tread, and being so positionedthe metal will bend more easily around the nosing as shown in Figs. 1and 2. However a 'nosing'may be. prepared as shown in Fig. 3 hereinafterdescribed. The object of dove-tailing the grooves is that the edgesas at5 are kept sharp by wearing the metal away fromvthe face as at 6, andalso being dovetailed is a means that when the sole of the shoe ispressed thereon it will en-' gage tightly between the edges preventingthe possibility of slipping. Where the edges occur on the nosing asshown in Figs. 1, 2 and 3, and particularly illustrated in Fig. 3, theedge will cling firmly to the sole of the shoe, should the pedestrianfail to properly reach the tread, that is to say, the toe of the shoe 6barely engages on the nosing, at a which time the edge will imbed in thesole of the shoe supporting the foot firmly, therefore the edgesb einplaced rendstoe1iminate'serious.jaccidents Whether going upaor,

down thestairs, andthe-possibility of slip ping from the slanting; sides;of-.:-thresholds{ i's-r eliminated. ,=,j- 1 v. v I

In F 1g. 3 1s shown a segmental plate 7 having dovetailed grooves on theconvex side tread 9 of the stair. The said web member is spaced from theupper edge as at A of the snugly to engagement on the plane ofthe webmember 8, and also preventing anflout ward movement thereof.

The covering herein described is preferably made of brass for the betterappearance, and also that it will bend easily, and the sharp edges ofthe dovetailed members are not easily broken, however aluminum will Afunction in a similar way, other' metal may be employed withoutdeparting from the spirit of my invention.

Such modifications may be employed to conform to the different uses thatthe covering may be adapted to.

Having thus described my invention, what I claim as new and desire tosecure by Let- I ters Patent is -1. In a non-skid metalcovering forstair treads, a plurality of dove-tailed or undercut grooves extendingpart way through a metal sheet, said dove-tailed grooves longitudinallyositioned and in close proximity to each 0t er and having a bend on oneside of the metal covering to conform to the nosing of a stair tread,whereby the edges of the groove will abruptly protrude, substan: tiallyas. shown, the edges being kept sharp by the wear imposed thereon.

2. Ina non-skid metal covering for stair treads, a plurality ofdove-tailed or undercut grooves extending part way through the metalcovering, said dove-tailed grooves lon gitudinally positioned and inclose proximity to each other, and being so positioned that' the edgesformed by the undercut will be sharpened by wearing of the metal betweenthe edges at the outer surface, for the purpose described.

3. In a non-skid metal covering for stair treads, a plurality ofdovetailed or undercut grooves extending part way through the metalcovering, said dove-tailed grooves being longitudinally positioned withthe covering and in close proximity to each other, the edgesautomatically sharpened as the metal is worn away between the grooves, acurved portion of the structure of suflicient width to function as acovering for the curvature of a stair tread nosing.

4-. In a non-skid metal covering for stair treads, a plurality ofdovetailed or underout grooves extending partway through the metalcovering, said dovetailed grooves longitudinally positioned with thecovering and in close proximity to each other, the groovesbeing unfilledso that the outer edges formed thereby will function as a grippingineansfor the sole of a shoe or other structure compressed thereonythe edgesbeing sharpened by reason of the undercut oi? the groove formation andthe wearing ofthe metal from the space between the grooves. V

In testimony whereof I affix my signature.

GEORGE w. BROOKS.

